Dredge-pump



A. G. STENBERG.

DREDGE PUMP.

n 1914. 1 $74,538. Patented Apr. 12,1921.

' 3 SHEETS-SHEET 1.

A. G. STENBERG.

DREDGE PUMP.

APPLICATION mfp JULY 29. 1914.

1,374,533. Patented Apr. 12, 1921.

3 SHEETS-SHEET 2.

h//m/f 5555 /AWE/L/a/ www M. @wf MM... #I Mw A. G. STENBERG.

DREDGE PUMP.

APPLICATION FILED JULY 29,1914.

Patented Apr. 12, 1921.

3 SHEETS-SHEET 3.

h//m/fJJEJ V /MWWW/ ANDERS GUSTAF STEINBERG, F GALVESTON, TEXAS.

Daunen-PUMP.

Specication of Letters Patent. Patented pl. 12, 192,1..

Application led J'u1y329, 1914. Serial No. 853,851.

To all whom it may cimcem.' v Y Be it known that I, ANDERS GUSTAF STEN- BERG, a citizen of the United States, residing at Galveston, in the county of Galveston and State of Texas, havefinvented certain new and useful Improvements in Dredge-Pumps, of which the following is a specication. i

' This invention relates to improvements in dredge pumps and its object Vis to produce a pump of this class that is simple in construction, cheap to manufacture and powerful and efficient in operation. Means are provided whereby congestion of the inlet is avoided. The pump is of the type usually carried upon a dredge and provided with a hose, connecting with the intake, which leads to the bottom of the river to draw up sand, gravel andthe like.

'W ith the foregoing and other objects in e view the invention consists in the comblnation and arrangement of parts to be hereinafter fully described in the following' speciiication, pointed out iii the claims and illustrated in the accompanying drawings which form a part of said specification and `in which- Figure 1 isa vertical section through my improved pump.

Fig. 2 is a section taken on line 2--2 of Fi 1. l u Fig. 3 is a section taken on line 3-3 of Fig. 1. l p t Fig. 4 is a section taken on line 4-4 of .'Fig. 1.

Fig. 5 is a section taken on line 5 5 of lgaike reference characters indicate corresponding parts throughout the several views.

The reference numeral 1 desi ates the body of the pump which is forme with the inlet-2 and outlet 3 and a casing 4L is suitably secured to the pump body to cover the rotor or piston 5 which is fast'to the shaft 6 which may be connected directlj to the motor or other power supply. ach of the wings of the piston is recessed along each edge as at 6a to permit passage over the ribs 7 formed in the pump body whereby the maximum degree of suction is created in the portion of the piston chamber that registers with the inlet 2. The recessed portions of the wings passing over the rib 7 create friction which increases the suction power of the rotor. 8, 8 are passage-ways that connect the inlet 2 with the vacuum chamber inthe piston chamber, the openings 9 being in the inlet and the openings l0 being in the vacuum chamber thus affording a means for relieving possible congestion of the intake. The material drawn -through the intake and vacuum chamber sejected through the outlet 3. A man hole 11 connects w1th the inletl 2 and is provided'with a cap or cover 12 which may be removed when it is desired to lclean the pump or for other reason. y

The operation of the invention is as fcllows:V Power being applied to rotate the shaft 6, the rotor is made to turnin a counterclockwlse dlrecticn,` as looked at in Fig'. 1.

' The turning of the rotor creates a suction in the casing and draws up the material into the inlet 2. This material finds its way through the constricted substantially tan-- gential throat to the pockets 0f the rotor confined between adjacent blades 5. It also 1s drawn around through the by-pass 9, `10, and delivered into the central portions of 'the pockets. By having a two-point delivery of the material to the rotor the filling of the pockets to capacity is assured, and it is the attainment of this object'that secures the highest eiiiciency of a pump of this character. Thel material entering through the throat arranges itself circumferentiall'yin l the pockets, while that. drawn in through the by-pass 9, 1Q, is caused to lill the interior thus entering 1n opposite directions and combinlng to completely ll the pockets.

The port 9, placing the by-pass in com-l y -munication withv the inlet 2 is disposed close to the constricted throat so that any conges.- t1on sought to be created by the reduction -in cross-sectional area of the throat will be relieved b the diverting of vmaterial also through t 'e by-pass.

Owin is estab ished between the pockets of the rotor. It is highly important to the most efficient operation of the pump, that the maximum suction should be maintained by the rotor. The high rateh of speed at which the rotor is revolving, will maintain a suction at the inlets and owing to the communication established by the recesses 6, this suction will manifest itself to an extent, throughout all the pockets of the rotor not engaged by the ribs 7 Thus as each pocket comes over the inlets, there will be no lost energy due to improper suction, as to a ce1:-

to the-recesses 6a, communlcation .o

tain extent there will .already exist a` suction A' in the pockets.

Now there is another function produced by the recesses 6a, and this function flows from the'coperation of these recesses withthe port 10 that leads from the ley-pass into jthe. rotor chamber. v As shown in Fig. 1,

this port 10 is of anv arcuate form struck from the same center, and having the same radius, as the recesses 63,'a`nd consequently as the blades 5 4rotate the recesses pass this-A port 10 in registry therewith, so that there is not that diminution of the port area that would result where the edges of unrecessed blades crossed the same. In consequence',

the flow from thel by-pass to the pockets is continuous and unchecked at all tlmes. What is claimed is: 1. A pump including a rotor chamber having an inlet and an outlet, a rotor in said chamber havingseparated pockets arranged in communication, and means for cutting off the lcommunication between the pockets as same approach said outlet. v

. 2. A pump including a rotor chamber having an inlet and an outlet, a rotor in said chamber having separated pockets normally in communicatlon, passages A'for delivering material to the rotor pockets both centrally and peripherally,'and means for cutting off the communication of eachpocket with the next following pocket das the former ap` proach and pass said outlet.

3. .A pump including a rotor chamber,

having an inlet and an outlet, a rotor in said chamber having `blades dividing the rotor into a series of pockets, said blades having recesses in their edges to lallow of communication between said pockets, a reduced throat for delivering material from the inlet to the pockets through the peripheryof the rotor, a by-pass having an intake port in communication with said inlet near ,Said throat, and a discharge port leading as my own I have hereto afIiXed my signature in the presence of two subscribing witnesses.

ANDERS GUsTAF STENBERG. Witnesses:

' J. F. SARNER,

W. E. GRovER.

arcuate and dis- 

